A muffle furnace protection device

Abstract

This utility model relates to the field of muffle furnace technology, specifically to a muffle furnace lining protection device. It includes a movable furnace lining formed by a lower baffle, an upper baffle, and two side baffles joined together. The side baffles are vertically positioned at the top edge of the lower baffle and slidably connected to it. The upper baffle is slidably positioned on top of the two side baffles. The upper baffle has a smoke exhaust hole at its top, and symmetrical baffle strips are arranged on the bottom of the upper baffle inside the side baffles, fitting snugly against them. Two corner seats are arranged opposite each other on the top of the lower baffle, slidably connected to the lower and side baffles. This utility model effectively prevents molten samples from splashing and adhering to the inner wall of the furnace lining and the resistance wire. It also isolates and exhausts corrosive gases, effectively reducing their erosion of the furnace lining and resistance wire, extending their service life and maintenance cycle, and lowering maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of muffle furnace technology, specifically to a muffle furnace furnace protection device. Background Technology

[0002] A muffle furnace is a device that uses resistance wire heating to achieve high-temperature heating. Also known as a box-type resistance furnace, it is widely used in metallurgy, chemical industry, materials, scientific research and other fields. It is suitable for chemical analysis of coal, coking products and chemical raw material samples. It is mainly used for processes such as sample calcination, melting and heat treatment. The furnace structure of a muffle furnace usually includes a furnace shell, a furnace body and resistance wires embedded in the inner wall of the furnace body. The resistance wires are exposed on the inner wall of the furnace body.

[0003] When processing corrosive samples containing elements such as chlorine, sulfur, and fluorine, or conducting melting experiments in a muffle furnace, the molten sample easily splashes and adheres to the inner wall of the furnace body and the resistance wire, causing damage to these components. Simultaneously, the sample generates a large amount of corrosive gases (such as hydrogen chloride, sulfur dioxide, and hydrogen fluoride) at high temperatures. These gases permeate the interior of the furnace body and directly contact the refractory material on the inner wall of the furnace body and the exposed resistance wire, causing severe corrosion damage. On the one hand, the refractory material on the inner wall of the furnace body corrodes, leading to peeling and cracking, resulting in decreased insulation performance, reduced heating efficiency, and even rendering the furnace unusable. On the other hand, the resistance wire corrodes, causing oxidation, thinning, and breakage, resulting in unstable heating power and frequent equipment failures. Typically, the furnace body and resistance wire need to be replaced or repaired every six months, impacting production and experimental progress and incurring high maintenance costs. Summary of the Invention

[0004] This invention addresses the problems in existing technologies where molten samples easily splash and adhere to the inner wall of the furnace body and the resistance wire, and where corrosive gases easily corrode the furnace body and the resistance wire. It provides a muffle furnace protection device that effectively prevents molten samples from splashing and adhering to the inner wall of the furnace body and the resistance wire. Simultaneously, it isolates and removes corrosive gases, effectively reducing their erosion of the furnace body and resistance wire, extending their service life and maintenance cycle, and lowering maintenance costs.

[0005] To achieve the above objectives, the technical solution of this utility model is: a muffle furnace lining protection device, comprising a movable furnace lining formed by splicing a lower partition, an upper partition, and two side partitions. The movable furnace lining is a frame-like structure with a hollow interior and openings at both ends. The movable furnace lining is formed by splicing the lower partition, upper partition, and two side partitions, facilitating disassembly, maintenance, and replacement. By installing the movable furnace lining inside the furnace body, heat conduction is used to heat the sample inside the movable furnace lining, effectively protecting the furnace body and the resistance wire.

[0006] The side partitions are vertically mounted at the top edge of the lower partition and slidably connected to it. The upper partition is slidably mounted on top of the two side partitions. The upper partition has a smoke exhaust port at its top, and symmetrical baffle strips are arranged on the bottom of the upper partition, located inside the side partitions and fitting snugly against them. The side and upper partitions isolate and block corrosive gases, allowing them to escape through the smoke exhaust ports. These ports can be connected to an external smoke exhaust pipe on the furnace shell, allowing corrosive gases generated from the molten sample to escape through the exhaust pipe. This reduces the amount and duration of contact between the corrosive gases and the furnace body and resistance wire, thereby minimizing their erosion of the furnace body and resistance wire.

[0007] The lower partition has two corner seats opposite each other on its top. The corner seats are slidably connected to the lower partition and the side partition. The corner seats further fix the connection between the lower partition and the side partition, and the lower partition and the side partition can be detachably connected through the function of the corner seats.

[0008] Furthermore, the top of the lower partition is symmetrically provided with two parallel slide rails, and the upper and lower ends of the side partition are respectively provided with an upper slide groove and a lower slide groove. The side partition is slidably disposed on the top of the lower partition through the cooperation of the lower slide groove and the slide rail, so as to facilitate quick disassembly and replacement of the side partition and the lower partition.

[0009] Furthermore, the bottom of the upper partition is symmetrically provided with sliders that match the upper sliding groove. The upper partition is slidably disposed on the top of the side partition through the cooperation of the sliders and the upper sliding groove, so as to facilitate quick disassembly and replacement of the upper partition.

[0010] Furthermore, a baffle is vertically provided at the top rear end of the side partition, and the rear end of the upper partition is symmetrically provided with notches that match the baffle. When the upper partition is installed, the baffle acts as a barrier to ensure that the upper partition is installed in place.

[0011] Furthermore, the top of the lower partition has two lower L-shaped grooves facing each other, and the lower inner side of the side partition has a side L-shaped groove; the bottom and outer side of the corner seat are respectively fixedly provided with L-shaped connecting seats, which match the lower L-shaped grooves and the side L-shaped grooves. The design structure of the L-shaped connecting seats realizes the connection between the corner seat and the lower partition and the side partition, ensuring the stability of the connection between the lower partition and the side partition.

[0012] Furthermore, the two L-shaped connecting seats are slidably disposed in the lower L-shaped groove and the side L-shaped groove, respectively. Pull plates are fixedly disposed at both ends of the corner seat to facilitate disassembly and installation of the corner seat. Through the cooperation of the L-shaped connecting seats with the lower L-shaped groove and the side L-shaped groove, the corner seat further fixes the connection between the lower partition and the side partition, thereby improving the stability of the connection between the lower partition and the side partition.

[0013] Furthermore, grooves are provided on the top of the lower partition, the inner side of the side partition, and the bottom of the upper partition, respectively, to facilitate the disassembly of the lower partition, the side partition, and the upper partition.

[0014] The beneficial effects of this utility model through the above technical solution are as follows: This utility model has a reasonable structure and is easy to disassemble and maintain. It can effectively protect the furnace body and prevent the sample from splashing and adhering to the inner wall of the furnace body and the resistance wire after melting, thus avoiding damage to the furnace body and the resistance wire. At the same time, it can isolate and discharge corrosive gases, effectively reducing the erosion of the furnace body and the resistance wire by corrosive gases, extending the service life and maintenance cycle of the furnace body and the resistance wire, and reducing maintenance costs.

[0015] This invention utilizes a lower and upper partition plate connected to two side partition plates to form a movable furnace chamber, facilitating disassembly, maintenance, and replacement. By installing the movable furnace chamber inside the furnace body, heat conduction is used to heat the sample inside the movable furnace chamber, effectively protecting the furnace body and resistance wire. This prevents molten sample from splashing and adhering to the inner wall of the furnace body and the resistance wire. Simultaneously, the side and upper partition plates isolate and block corrosive gases, reducing the amount and duration of contact between corrosive gases and the furnace body and resistance wire. Furthermore, the corrosive gases can be discharged through the exhaust vents, thereby reducing the erosion of the furnace body and resistance wire by corrosive gases. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a muffle furnace furnace protection device according to this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a muffle furnace furnace protection device according to this utility model. Figure 2 ; Figure 3This is a schematic diagram of the structure of a muffle furnace furnace protection device according to this utility model. Figure 3 ; Figure 4 This is a schematic diagram of the structure of the lower partition of this utility model; Figure 5 This is a schematic diagram of the side partition of this utility model; Figure 6 This is a schematic diagram of the upper partition of this utility model; Figure 7 This is a schematic diagram of the structure of the angular seat of this utility model. Figure 1 ; Figure 8 This is a schematic diagram of the structure of the angular seat of this utility model. Figure 2 ; Figure 9 This is a schematic diagram of the structure in use of this utility model. Figure 1 ; Figure 10 This is a schematic diagram of the structure in use of this utility model. Figure 2 .

[0017] The following labels are used in the attached diagram: 1 is the lower partition, 101 is the slide rail, 102 is the lower L-shaped groove, 2 is the side partition, 201 is the lower slide groove, 202 is the upper slide groove, 203 is the baffle, 204 is the side L-shaped groove, 3 is the upper partition, 301 is the slider, 302 is the baffle strip, 303 is the notch, 304 is the smoke exhaust hole, 4 is the angle seat, 401 is the L-shaped connecting seat, 402 is the pull plate, and 5 is the pull groove. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-10 As shown, a muffle furnace lining protection device includes a movable furnace lining formed by splicing together a lower baffle 1, an upper baffle 3, and two side baffles 2. The movable furnace lining is a frame-like structure with a hollow interior and openings at both ends. In this embodiment, after the movable furnace lining is formed by splicing together the lower baffle 1, the upper baffle 3, and the two side baffles 2, it is placed inside the furnace body. The sample to be heated is placed inside the movable furnace lining, and the sample is heated and melted by heat conduction. The lower baffle 1, the upper baffle 3, and the two side baffles 2 can prevent the molten sample from splashing onto the inner wall of the furnace body and the resistance wire, while also isolating and blocking corrosive gases generated by the molten sample. Since the movable furnace lining is composed of the lower baffle 1, the upper baffle 3, and the two side baffles 2, when the movable furnace lining experiences wear or corrosion after long-term use, it can be quickly disassembled and replaced without the need for overall maintenance of the furnace body, thus reducing maintenance costs and difficulty.

[0019] The side partition 2 is vertically disposed at the top edge of the lower partition 1 and is slidably connected to the lower partition 1. The upper partition 3 is slidably disposed on the top of the two side partitions 2. The top of the upper partition 3 is provided with a smoke exhaust hole 304. The bottom of the upper partition 3 is symmetrically provided with baffle strips 302 located inside the side partitions 2. The baffle strips 302 are fitted to the side partitions 2. In this embodiment, the side partition 2 is slidably connected to the lower partition 1 and the upper partition 3 to facilitate the disassembly, maintenance and replacement of the movable furnace. The outer side of the side partition 2 is on the same vertical plane as the sides of the lower partition 1 and the upper partition 3. The lower partition 1, the upper partition 3 and the two side partitions 2 block splashing molten samples and corrosive gases. The exhaust port 304 can be connected to the exhaust pipe outside the furnace shell through a pipe. The corrosive gases generated by the molten samples can be discharged from the movable furnace through the exhaust port 304 and discharged through the exhaust pipe. The diameter of the exhaust port 304 is 30mm. There are two baffle strips 302 at the bottom of the upper partition 3. The two baffle strips 302 are in contact with the two side partitions 2 respectively, which can effectively prevent the side partitions 2 from tipping over.

[0020] In this embodiment, the thickness of the lower partition 1, the upper partition 3, and the two side partitions 2 are all 5-10 mm, and they are all made of high-purity alumina ceramic. High-purity alumina ceramic has excellent high-temperature resistance (long-term operating temperature can reach above 1600℃) and corrosion resistance, and can effectively resist the erosion of acidic and alkaline corrosive gases. At the same time, it has good thermal conductivity, which will not affect the temperature distribution in the furnace too much, ensuring that the sample is heated evenly.

[0021] Two corner seats 4 are disposed opposite each other on the top of the lower partition 1, and the corner seats 4 are slidably connected to the lower partition 1 and the side partition 2. In this embodiment, the corner seats 4 have an "L"-shaped structure, and the horizontal and vertical parts of the corner seats 4 are in contact with the lower partition 1 and the side partition 2 respectively. Through the function of the corner seats 4, the connection between the lower partition 1 and the side partition 2 can be further fixed, thereby improving the overall stability of the movable furnace.

[0022] The lower partition 1 has two parallel slide rails 101 symmetrically arranged on its top. The side partition 2 has an upper sliding groove 202 and a lower sliding groove 201 at its upper and lower ends, respectively. The side partition 2 is slidably mounted on the top of the lower partition 1 through the cooperation of the lower sliding groove 201 and the slide rails 101. In this embodiment, the cooperation of the lower sliding groove 201 and the slide rails 101 facilitates the pushing and pulling of the side partition 2, thereby facilitating the quick assembly and disassembly of the side partition 2 and the lower partition 1.

[0023] The bottom of the upper partition 3 is symmetrically provided with sliders 301 that match the upper sliding groove 202. The upper partition 3 is slidably disposed on the top of the side partition 2 through the cooperation of the sliders 301 and the upper sliding groove 202. In this embodiment, the cooperation of the sliders 301 and the upper sliding groove 202 facilitates the pushing and pulling of the upper partition 3, thereby facilitating the quick assembly and disassembly of the side partition 2 and the upper partition 3.

[0024] A baffle 203 is vertically provided at the top rear end of the side partition 2, and a notch 303 matching the baffle 203 is symmetrically provided at the rear end of the upper partition 3. In this embodiment, the height of the baffle 203 is the same as the thickness of the upper partition 3. When the upper partition 3 is installed, the baffle 203 acts as a block to ensure that the upper partition 3 can be installed in place.

[0025] The lower partition 1 has two lower L-shaped grooves 102 opposite to each other at its top, and the side partition 2 has a side L-shaped groove 204 on its lower inner side. The bottom and outer sides of the corner seat 4 are respectively fixed with L-shaped connecting seats 401, which match the lower L-shaped grooves 102 and the side L-shaped grooves 204. In this embodiment, the corner seat 4 is connected to the lower partition 1 and the side partition 2 via the L-shaped connecting seats 401, further ensuring the stability of the connection between the lower partition 1 and the side partition 2.

[0026] The two L-shaped connecting seats 401 are slidably disposed in the lower L-shaped groove 102 and the side L-shaped groove 204, respectively, and pull plates 402 are fixedly disposed at both the front and rear ends of the corner seat 4. In this embodiment, the L-shaped connecting seats 401 are slidably disposed in the lower L-shaped groove 102 and the side L-shaped groove 204 to facilitate the installation and removal of the corner seat 4, and the pull plates 402 facilitate the removal of the corner seat 4.

[0027] The lower partition 1 has grooves 5 on its top, the side partition 2 on its inner side, and the upper partition 3 on its bottom. In this embodiment, the grooves 5 are located at the front ends of the lower partition 1, the side partition 2, and the upper partition 3, respectively, so as to facilitate the pulling and disassembling of the lower partition 1, the side partition 2, and the upper partition 3.

[0028] In use, this invention first selects appropriate sizes for the lower partition 1, side partitions 2, and upper partition 3 based on the height and dimensions of the sample. Then, the movable furnace is assembled. The lower partition 1 is placed inside the muffle furnace body. Next, the sliding grooves 201 at the bottom of the two side partitions 2 are aligned with the two sliding rails 101 at the top of the lower partition 1, pushing the two side partitions 2 into the furnace body. Then, the upper partition 3 is installed on top of the two side partitions 2, so that the two sliders 301 at the bottom of the upper partition 3 correspond to the upper sliding grooves 202 at the top of the two side partitions 2, pushing them into the furnace body. The upper partition 3 has two baffle strips 302 at its bottom, which are located on the inner sides of the two side partitions 2. When the upper partition 3 cannot be pushed any further, the baffle 203 blocks the upper partition 3, and the upper partition 3 is installed in place. Finally, the corner seat 4 is installed at the connection between the lower partition 1 and the side partition 2, wherein the L-shaped connecting seat 401 of the horizontal and vertical parts of the corner seat 4 corresponds to the lower L-shaped groove 102 on the lower partition 1 and the side L-shaped groove 204 on the inner side of the side partition 2, respectively. Then, the corner seat 4 is pushed into the furnace body. After both corner seats 4 are installed in place, the assembly of the movable furnace is completed.

[0029] The sample to be heated is then placed on top of the lower partition 1. The muffle furnace door is closed and the muffle furnace is started. The resistance wire generates heat after being energized, and the sample in the movable furnace is heated by heat conduction. The corrosive gases generated during the heating process are isolated and blocked by the lower partition 1, the side partition 2, and the upper partition 3, and are discharged from the movable furnace through the exhaust port 304 and then through the exhaust pipe. At the same time, the splashed molten sample is blocked by the lower partition 1, the side partition 2, and the upper partition 3, thus preventing the sample from splashing and adhering to the inner wall of the furnace body and the resistance wire after melting. It should be noted that although the movable furnace in this invention cannot completely isolate the corrosive gases, the isolation effect of the lower partition 1, the side partition 2, and the upper partition 3 and the exhaust function of the exhaust port 304 can greatly reduce the amount and time of contact between the corrosive gases and the furnace body and the resistance wire, thereby significantly reducing the degree of corrosion of the furnace body and the resistance wire by the corrosive gases. Actual testing showed that by using the protective device of this utility model, the maintenance cycle of the muffle furnace was extended from the original 6 months to 12 months, and the maintenance cost was reduced by more than 50%. At the same time, the heating efficiency and temperature stability of the muffle furnace were also effectively guaranteed.

[0030] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. A muffle furnace lining protection device, characterized in that, The movable furnace is a frame structure consisting of a lower partition (1) and an upper partition (3) connected to two side partitions (2). The movable furnace is hollow inside and open at both ends. The side partition (2) is vertically disposed at the top edge of the lower partition (1) and is slidably connected to the lower partition (1). The upper partition (3) is slidably disposed on the top of the two side partitions (2). The top of the upper partition (3) is provided with a smoke exhaust hole (304). The bottom of the upper partition (3) is symmetrically provided with baffle strips (302) located inside the side partitions (2). The baffle strips (302) are fitted to the side partitions (2). The top of the lower partition (1) is provided with two corner seats (4) opposite each other, and the corner seats (4) are slidably connected to the lower partition (1) and the side partition (2).

2. The muffle furnace furnace protection device according to claim 1, characterized in that, The top of the lower partition (1) is symmetrically provided with two parallel slide rails (101). The upper and lower ends of the side partition (2) are respectively provided with an upper slide groove (202) and a lower slide groove (201). The side partition (2) is slidably disposed on the top of the lower partition (1) through the cooperation of the lower slide groove (201) and the slide rail (101).

3. The muffle furnace lining protection device according to claim 2, characterized in that, The bottom of the upper partition (3) is symmetrically provided with sliders (301) that match the upper slide groove (202). The upper partition (3) is slidably disposed on the top of the side partition (2) through the cooperation of the sliders (301) and the upper slide groove (202).

4. The muffle furnace lining protection device according to claim 1, characterized in that, A baffle (203) is vertically provided at the top rear end of the side partition (2), and a notch (303) matching the baffle (203) is symmetrically opened at the rear end of the upper partition (3).

5. A muffle furnace furnace protection device according to claim 1, characterized in that, The top of the lower partition (1) has two lower L-shaped grooves (102) facing each other, and the lower inner side of the side partition (2) has a side L-shaped groove (204); the bottom and outer side of the corner seat (4) are respectively fixedly provided with L-shaped connecting seats (401), and the L-shaped connecting seats (401) match the lower L-shaped grooves (102) and the side L-shaped grooves (204).

6. A muffle furnace lining protection device according to claim 5, characterized in that, The two L-shaped connecting seats (401) are slidably disposed in the lower L-shaped groove (102) and the side L-shaped groove (204) respectively, and the front and rear ends of the corner seat (4) are fixedly provided with pull plates (402).

7. A muffle furnace furnace protection device according to claim 1, characterized in that, The bottom of the lower partition (1), the inner side of the side partition (2), and the bottom of the upper partition (3) are respectively provided with grooves (5).

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